A lot of trouble with Windows 7

Interesting. I think there probably is a hardware issue going on here. Can you try contacting the manufacturer for any warranty or any further assistance? That might get you further.

Also, the reason why you don't have the pretty GUI boot is that when in Windows 7 and your screen resolution doesn't match up with the minimum requirements for Windows (I believe it's around CRT resolution for the pretty GUI boot), the GUI boot will default to the icky vista one. I see it a bit when installing Windows 7 on netbooks. It's a damn shame I think. I like sitting at my desk looking at the pretty Windows flag glowing three times... :)

Just for poops and giggles, does your monitor and puter have a DVI port? I kind of want to see what happens there, maybe it'll be recognized as HDMI?

Crap, I think I helped someone with a dual display setup that had something weird go on with their monitor in NVIDIA control panel. The projector was recognized properly, but the monitor wasn't. I do not remember what we did.

And another thing, if I was in your position and since we're not sure what's up, I'd pull the third party, non-partisan card and run your system with a different hard drive to fully make sure it isn't a virus or any malware. Install the NVIDIA driver if needed and test the monitor. If the monitor still shows up as weird, I do believe you have and effed up monitor. That is just another test to try if you can.

From what I can see, I believe it's another corrupt EDID file in the monitor, anyone got a fix for my LG E2250v? If you do, I might give it a try.

I too, had some problems with EDID in windows7 64bit when I first set it up. It does happen and the fix can be simple.
Try to remove the monitor,put another one on so you can log on, remove it, and then re-connect the preferred monitor. This can re-set the plug-n-play and correctly identify your device. It doesn't always work- but I ran across that advice and several people swore by it. It didn't work for me- but try the easiest thing first.
If that doesn't work search for: "Force EDID in Windows 7" You can either: 1) find the driver that is part of the monitors EDID chip and then use device manager to accept it as the new driver. or 2)"hack" your own driver and do the same- tell device manager device properties that you "have the disk" and just point it to the appropriate .inf file. There are free utilities that can decipher drivers and re-package them as .inf files. Look for a program called: "Phoenix"
But try what's easiest first, then search for step-by-step instructions. When I get home from work I'll see if I can find some direct links on my 64bit machine.
But hopefully it will fix the easy way.

OP needs to backup files, wipe the HD to overwrite any infected or otherwise corrupt code before proceeding.

If you don't have another HD, external, enough DVD storage, or a network to transfer files to another computer, then with each Windows Live ID you can store 25gb on MS's secure Skydrive - just google it and sign in.